continued by you
Note added on July 8, 2016: the web pages provided by my lab no longer allow cgi scripts, which explains why some the links below do no longer work.
2. Run the program on the Cunningham input list [warning: this list is outdated] as follows (here under Unix); you'll need about 500MB of memory:
$ ecm 43000000 < cunningham.in > cunningham.out &
3. Search for new factors using 'grep found cunningham.out', and report them to Sam Wagstaff and Paul Zimmermann.
4. When the program finishes (after one week to one month depending on your machine), download the updated list and restart it.